Heavy-oil vaporizer



, D. T- SCOTT HEAVY OIL VAPORIZER April 26 Filed March 1 1924 y 3mmDar/'0 Z 54077? NhM Patented Apr. 26, 1927.

DAVE) T. SCOTT, OI MITCHELLS ISLAND, VANCOUVER, CANADA.

HEAVY-OIL varomzna.

A-pplication filed March 13, 1924; Serial No. $9,088, and in CanadaDecember 24,1923.

This invention relates to a means for vaporizing a heavy oil by the heatof the engine exhaust and for mixing the oil vapor with the required airfor combustion in an internal combustion engine.

It comprises the combination with an ordinary carburetter of a chamberthrough which the engine exhaust passes before its delivery to theatmosphere, in which exhaust heated chamber the oil and the air withwhich the oil is vaporized and which is to be mixed in the carburetter,is heated to a temperature approaching that of volatilization of a heavyfuel oil, and through which exhaust heated chamber, the oil vapor, whenmixed with the air for combustion, passes from the carburetter to theintake of the engine. p

The particular means by which this result is attained is fully describedin the following specification, reference being made to the drawings bywhich it is accompanied, in.

which:

Fig. 1 is a vertical longitudinal section on the line 1--1-in Fig. 3,looking in the direction of the arrow.

Fig. 2 is a vertical section on the line 22 in Fig. 1.

Fig. 3.is a vertical section-on the line 3-3 in Fig. 1, and

*Fig. 4 is a cross section on the line 4-4 in Fig 1.

In these drawings 2 represents the, carburetter, 3 the oil, and 4 theair, delivery thereto, and 5 is the pipe through which the vaporized oiland air passes from the car-- buretter to the intake manifold of theengine and in which pipe it is heated by ex posure to the exhaust oftheengine in a manner to be described. 6 is the valve which controlsdelivery from the carburetter.

This gas delivery pipe 5 from the carburetter passes through the ends ofa substantially rectangular closed chamber 7. To

one end of this chamber 7 is secured a head- 9 having two ducts 8 and10, of which 8 is in communication with the pipe 5 and delivers to theengine intake, and the other 10, is connected to the exhaust of theengine to deliver the exhaust into the chamber 7 surrounding the tube 5.From the edge of this exhaust delivery port 10, wh1ch 1S'-fllI- therfrom the intake tube 5, partitions 11 and 12 extend. to nearly the otherend of the chamber 7 where the5 are connec to- From each side of eachdoor 15 a sheet iron' casing 16 is carried around the other three sidesof the chamber 7. to maintain an air space 18 between the walls of thechamber and the casing, The'upper part of this air space 18 is opentothe atmosphere adj acent the sides of the door 15, and opposite.

the door theair space is connected through tubes 14 to the space 17between the walls 11 and 12, which space is connected to the air intaketo the carburetter through the 'duct 19.

An oil delivery tube 20 passes once or more around the chamber 7 in thelowerv part of this air space '18 and is connected at3 to thecarburetter.

With this construction the exhaust of the engine enters the chamber at 7and passes downward around the gas delivery tube 5 and upward among thetubes 1% before its delivery to the atmosphere through the port 13. .Thewaste heat of this exhaust thus passes through the walls of the chamberand heats the air for combustion in the air space 18through which theair for the carburetter is indrawn. It derives further heat from theexhaust as it passes through-the tube 14 and while it passes through thespace 17 before its delivery through the, duct 19 to the carburetter at4;. I

By this means both theoil and the air are heated to a temperatureapproaching that of volatilization of even a heavy oil before deliveryto the carburetter.-

The oil vapor and air for combustion, as it is drawn from thecarburetter, is further highly heated as it passes through the tube 5 tothe intake of the engine, where the tube 5 is in contact with thehottest part of the exhaust, where it is delivered through the ort 10intothe chamber7.

'1 e tube 5 will preferably be len hwise ribbed, as shown in the drawingas iiording a eater heat conducting surface.

$11.11 these conditmns, not only can a heavy fuel oil be effectivelyvaporized and the chamber, which compartment is conwithoutcarbon'ization, but the exhaust from nected by tubes to the 'acket spaceand to the engine is muflled and cooled before its the air inlet of thecar uretter, means for delivery to the atmosphere, and the coolingadmitting air to the jacket space, means for of the exhaust gasesprevents the muflling heating oil in the jacket space of the chamfromcausing a back pressure in the cyl: ber, and means for delivering theaseous inders. mixture of oil vapor and air from t e car- To'enableanengine heavy oil vaporizer to be started a supple the engine intake.mentarycarbu'retter 21. served at 22 with n gasolene or a lighthydrocarbon oil may combination with a curburetter, of a chame furnishedand the gas delivery pipe 23 her through which the engine exhaust isdefrom this carburetter may be connected to livered, said chamber havinga jacket space the gas intake pipe 5. After the engine is surrounding itand a compartment within started the supplementary carburetter maythechamber w ich is in direct communicabe cut off by the valve 24. tionthrou h tubes withinthe jacket space An aperture 25, see Fig. 1,afl'ords direct and'with the air delivery to the carburetter,comunication between the 'exhaustadmismeans admitting air to the jacketspace,

sionlO to the'chamber 7' and the exit 13 means within the chamber forheating the therefrom, which aperture is closable with oil fuel beforeits delivery to the carburetter, a valve 26 by which valve the amount ofthe and means within the chamber for separately exhaust gases deliveredinto the chamber 7 heating the vaporized oil and air before ole-- may bere lated to the engine requirements. liver to the engine intake. ThePOSilllOIl Of this valve 26 ma be con- '3. n combination with acarburetter, a trolled by a thermostat in the c amber 7 vaporizercomprising a body having. an or in the gas delivery 5 t0 engine in ke.elongated chamber, a gas delivery pipe pass- By heating the fuelconstituents f r an ing through said chamber from end to end, internalcombustion engine in a chamber one end oi said ipe being connected tothe throu hwhich the exhaust ofthe engine is outlet of the car uretter,said chamber havpasse before delivery of these constituents ing anexhaust inlet opening at one end, a to a carburetter, a heavy fuel oilcan be cap having two ducts secured to said body, used in amoreeconomical manner and beone duct connected with said pipe at itsequipped with this buretter separately through the chamber to 2 In aninternal combustion engine,the

subject tomore effective control to meet the varying 7 requirements ofan engine than where the heated oil is sprayed into a cylinder or into aheated duct or passage where 'erture of the casing,

the oil is liable to carbonize, unless the temperature and theproportions are very carements. i w

vInstead of delivering the exhaust gases through the up er port of thecasing 15 and exhaustin t em to atmosphei'e through theport 13, idesired, this connectionniay be reversed and exhaust gas deliveryeffected at 13 and exhausted through the upperapregulated to thechanging require- Having now particularl described iny invention, Ihereby declare t at what-I claim .as new and desire to be protected inby, Letters Patent, is: a v i 1. In an internal combustion engine, the

combination with a carburetter, of a chamber through which the exhaustfrom the engine is passed said chamber havinga jacket space surround ingit and a compartment within other end and the other duct connected withthe exhaust inlet opening at the and chamber, the first of the said,capsducts adapted to connect with the intake of an engine while the other ofits ducts is adapted for connection with the exhaust at the engine, saidbody having a duct leading from the end of the said chamber farthestfrom the inlet opening back parallel to the chamber and delivering toatmosphere, a shell around three sides of said casing and enclosing afresh air space, said casing havin a chamair intake. of the carburetter,and tubes from tubes passing t rough said last named duct to be mated bythe exhaust gases, and an oil feed pipe to the carburetter and having aportion coiled around said casing within the fresh airchamber,substantiallyas shown and described. v

In testimony whereof I afix [Davin nscor'r.

my signature,

bar and a duct therefor connecte with the I

